It seems incredibly common in works of science fiction that touch upon technological immortality to focus on every possible way that such a technology could go wrong, create problems, or worsen social dynamics.

Among the negative outcomes that have attained trope levels of frequency, off the top of my head, I can name the following:

1. Immortality becomes available only to the ultra-wealthy, allowing them even more power to abuse everyone else, leading immortal people to be antagonists in a pretty generic dystopian plot.

2. Immortality subtly twists the morality of its beneficiaries, causing them to lose sight of "the real meaning of life" according to the author's worldview, and the protagonist usually fights for society to recognize how important death and endings are

3. Immortality causes people to go insane, become monsters, or otherwise utterly lose their humanity (this is more of an extreme version of case #2, but I feel it's distinct in the way a story plays out)

4. Immortality ultimately leads to the extinction of the human species due either to biological effects of the immortality technology in question, or due to cultural/societal shifts that lead people to stop reproducing

I'm sure there are many others that I'd recall if prompted, but my point is that I don't think I can name any science fiction that involves immortality technology that doesn't also decry it as ultimately a harmful development.

Are there any works of science fiction that any of you can think of that do more to celebrate the idea or look forward to it with some optimism?

Youtube Trailer : https://www.youtube.com/watch?v=aK-X2d0lJ_s
Netflix Link : https://www.netflix.com/title/81038963
Wikipedia page with plot summary : https://en.wikipedia.org/wiki/The_Old_Guard_(2020_film)